Insights

Startup Expertise 4xxi specializes in launching startups and developing innovative products across various industries, making them a strategic partner for early-stage companies seeking technical and product development support.

Diverse Technology Stack With expertise in backend, frontend, DevOps, AI/ML, and mobile development, 4xxi offers comprehensive solutions that can be tailored to meet complex project requirements, ideal for clients with advanced technological needs.

Global Market Presence Operating for over 12 years in multiple regions including the US, UK, Europe, and Asia, 4xxi has established a broad international footprint, enabling them to serve multinational clients with diverse business environments.

Recognized Industry Leader Awarded as the second top web development company and featured in top-tier publications like TechCrunch, Forbes, and NY Times, 4xxi’s reputation as a proven industry leader can facilitate trust and credibility with prospective clients.

Funding and Revenue Growth With a revenue range of $10M to $50M and a history of successful project completion, 4xxi demonstrates strong financial stability and growth potential, making them a reliable partner for scalable technology projects.

4xxi Tech Stack

4xxi uses 8 technology products and services including Parse.ly, Cloudflare CDN, Cloudflare, and more. Explore 4xxi's tech stack below.

Parse.ly

Analytics

Cloudflare CDN

Content Delivery Network

Cloudflare

Content Management System

HubSpot

Marketing Automation

Astro

Page Builders

Node.js

Programming Languages

reCAPTCHA

Security

Facebook

Widgets

4xxi Email Formats	Example	Percentage
FLast@4xxi.com	JDoe@4xxi.com	71%
FL@4xxi.com	JD@4xxi.com	17%
Last@4xxi.com	Doe@4xxi.com	8%
LF@4xxi.com	DJ@4xxi.com	4%

4xxi Email Formats

Example

Percentage

FLast@4xxi.com

JDoe@4xxi.com

71%

FL@4xxi.com

JD@4xxi.com

17%

Last@4xxi.com

Doe@4xxi.com

LF@4xxi.com

DJ@4xxi.com

Frequently Asked Questions

Where is 4xxi's headquarters located?

4xxi's main headquarters is located at 23 Leyborne Park Kew Gardens, Richmond, London, England TW9 3HB, GB. The company has employees across 3 continents, including EuropeAsiaNorth America.

What is 4xxi's official website and social media links?

4xxi's official website is 4xxi.com and has social profiles on LinkedIn.

What is 4xxi's NAICS code?

4xxi's NAICS code is 5415 - Computer Systems Design and Related Services.

How many employees does 4xxi have currently?

As of October 2025, 4xxi has approximately 23 employees across 3 continents, including EuropeAsiaNorth America. Key team members include Chief Product Officer: E. S.Ceo: E. T.Vp, Cto: A. B.. Explore 4xxi's employee directory with LeadIQ.

What industry does 4xxi belong to?

4xxi operates in the IT Services and IT Consulting industry.

What technology does 4xxi use?

4xxi's tech stack includes Parse.lyCloudflare CDNCloudflareHubSpotAstroNode.jsreCAPTCHAFacebook.

What is 4xxi's email format?

4xxi's email format typically follows the pattern of FLast@4xxi.com. Find more 4xxi email formats with LeadIQ.

When was 4xxi founded?

4xxi was founded in 2008.

4xxi

IT Services and IT ConsultingUnited Kingdom11-50 Employees

At 4xxi, we specialise in launching startups and crafting exceptional products that revolutionise industries and transform lives. Our philosophy revolves around creating products that truly make a difference. With over 15 years of experience, we've collaborated on world-class projects, and our clients have raised over $500M+.

Our services include:
- Backend Development
- Frontend Development
- DevOps
- AI/ML Solutions
- Mobile Development

Under-the-hood:

- ⏳ 12+ years on the global markets (🇺🇸, 🇬🇧, 🇻🇬, Asia, Eastern & Western Europe)
- 🗞 Publications about our client in TechCrunch, Forbes, Business Insider, NY Times, Wired
- 🏅 Became "Top #2 Web Development Company in the world" (c) Manifesto
- 🏪 HQ in London
- 🚀 100+ completed projects we are proud of
- 🧗♀️ Own awesome Startup Competitions in London in partnerships with WeWork, Barclays, F6S, 11FS, Capital Enterprise, VCs

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4xxi Tech Stack

Media & News

4xxi's Email Address Formats